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A block of mass m is placed on an another rough block of mass M and both are moving horizontally with same acceleration a due to a force which is applied on the lower block, then work done by lower block on the upper block in moving a distance s will be
  • a)
    mas
  • b)
    ( m + M ) as
  • c)
    M2/m  as
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A block of mass m is placed on an another rough block of mass M and bo...
Force on the upper block = ma Work done = F.S = mas
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Most Upvoted Answer
A block of mass m is placed on an another rough block of mass M and bo...

Explanation:

Given data:
- Mass of lower block (m) = m
- Mass of upper block (M) = M
- Acceleration of both blocks (a) = a
- Distance moved by blocks (s) = s

Work done by lower block on upper block:
- Work done = Force × distance

Force applied on lower block:
- Force = (m + M) × a (as both blocks are moving with the same acceleration)

Work done by lower block on upper block:
- Work = Force × distance
- Work = (m + M) × a × s

Substitute the given values:
- Work = (m + M) × a × s = m × a × s

Therefore, the work done by the lower block on the upper block in moving a distance s will be mas (option 'A').
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A block of mass m is placed on an another rough block of mass M and both are moving horizontally with same acceleration a due to a force which is applied on the lower block, then work done by lower block on the upper block in moving a distance s will bea)masb)( m + M ) asc)M2/m asd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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